Getting very high latency ~1day for events from IOT hub

[NucleoTech]

I have Azure Functions triggered by events from IOT hub. I am experiencing latencies up to 1 day from event enqueued time to function invocation.

Investigative information

Please provide the following:

• Timestamp: 2018-10-28T13:01:39.453Z
• Function App version (1.0 or 2.0): 1.0
• Function App name: Subscription 32483011-f64d-455e-b336-212fa95c1813
• Function name(s) (as appropriate): PlatformEventHandlerColdPath
• Invocation ID: 099c81a9-bd6b-459e-90b2-3712762ed667
• Region: South Central US

Expected behavior

Event latency to not exceed e.g. 1 minute

Actual behavior

In my function (invocation as above), if I compare DateTime.UtcNow with event enqueued time I get latency of 1day 23 mins. The actual duration of the call is ~500ms.

Related information

• Programming language used: C#
• The function accesses BLOB data is storage account as well as Azure tables. Then does some processing and writes data back into Azure tables.
• I created trace writer to Azure table in order to debug this. Attached is trace output for the above invocation.

[Uploading TraceEntry.xlsx…]()

[NucleoTech]

TraceEntry.xlsx

[NucleoTech]

Reopening